An issue was discovered in the stackvector crate through 2021-02-19 for Rust.
Priority MEDIUM 40CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
An issue was discovered in the stackvector crate through 2021-02-19 for Rust. There is an out-of-bounds write in StackVec::extend if size_hint provides certain anomalous data.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01025 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed stackvector (crates.io): 1.0.9
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | stackvector (crates.io) | before 1.0.9 | 1.0.9 | Patch available | GHSA-9frf-r7c7-j2vg |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- stackvector (crates.io) Vendor— Affected before 1.0.9 Fixed in 1.0.9 Patch available GHSA-9frf-r7c7-j2vg
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:stackvector_project:stackvector:*:*:*:*:*:rust:*:* | before 1.0.9 | Vulnerable | Stackvector Project |
- cpe:2.3:a:stackvector_project:stackvector:*:*:*:*:*:rust:*:* Versions before 1.0.9 Vulnerable ·Stackvector Project
Remediation
- Fix · GHSA-9frf-r7c7-j2vg stackvector (crates.io) Fixed in 1.0.9 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-29939
- 2026-10-03 Alias added: GHSA-9frf-r7c7-j2vg
References
Sources
- CVE-2021-29939 · CVE Program
- CVE-2021-29939 · NVD
- FIRST EPSS
- GHSA-9frf-r7c7-j2vg · GitHub Advisory Database · CC BY 4.0
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